Efficient Development Techniques Of The Sub-producing Layer Of Jingbian Gas Field

At home and abroad has now established a mature technology and methods to calculate the gas reservoir geological reserves, and gas production profile logging technology can accurately provide the contribution rate of gas production for each layer. In view of the condition of central region of the Jingbian gas field production, use the volumetric method to adjust account of the geological reserves of the study producing layer, use Material balance method and Yield cumulative method to calculate the dynamic reserves of the of the study producing layer, analyze the distribution and size of the reserves in the sub-producing layer of Jingbian Gas field, study the use of the degree of the reserves of sub-producing layer, and proposed technical measures for efficient development of sub-producing layer. To sum up this study are as follows:(1) Study the reservoir characteristics, and to classify the reservoir;(2) Comprehensive study of the microscopic characteristics of the sub-producing layer of Jingbian gas field by using a series of reservoirs microscopic pores research methods,(3) Study of air-water two-phase flow mechanism and the flow pattern of the sub-producing layer;(4) Use the volumetric method to caculate the geological static reserves of the study producing layer, use Material balance method and Yield cumulative method to calculate the dynamic reserves, verify the reserves of different sub-producing layer, clear the distribution and utilization situation of the reserves of the sub-producing layer;(5) Proposed efficient development technical measures of the sub-producing layer.In short, sub-producing layer are formations which with low porosity, low permeability, heterogeneity, underdevelopment pore throat, but have the potential for develop. Part of the sub-producing layer in the case of production increased pressure, the contribution rate of the small layer of gas production was significantly increased. Poor physical properties, uneven pressure distribution, resulting the sub-producing layer’s low degree of develop and utilization, and resulting the low productivity, the low efficiency of production, water along with the oil produced is more easily happened. Mainly for the pressure, Reservoir reconstruction, and water these three aspects, to increase the output of the sub-producing layer, we propose jet drainage technology, reservoir permeability modification technologies and foam drainage gas technology. And Field application is well.